#include <stdio.h>
#include <string.h>

void main()
{
    char s1[20];
    char s2[21] = "Hello World!";

    strcpy(s1, s2);

    puts(s1);

    printf("size 1: %d\n", sizeof(s1));
    printf("len 1: %d\n", strlen(s1));
}